Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091920 |
Airborne Dust Plumes Lofted by Dislodged Ice Blocks at Russell Crater, Mars | |
Cynthia L. Dinwiddie; Timothy N. Titus | |
2021-02-24 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Linear dune gullies on poleward‐facing Martian slopes are enigmatic. Formation by CO2‐ice block or snow cornice falls has been proposed based on optical imagery of bright, high‐albedo features inside gully channels. Because these features often resemble patchy frost residue rather than three‐dimensional blocks, more evidence is needed to support the ice‐block formation mechanism. Satellite imagery captured two simultaneous airborne plumes with in‐channel sources at the Russell crater megadune, thrust up and dispersed outward along the path of linear dune gullies. We use spectral data analyses, climatic analyses of bolometric temperatures and thermal modeling to further develop the mechanistic framework for linear dune gully development. Basal sublimation and CO2 gas venting likely cause CO2‐ice‐block detachment and falls from gully alcoves in southern early spring, accompanied by ice‐block offgassing and saltation of sands and coarse silts that are redeposited around gully channels, and lofting of sublimation lag (coarse dust/silt) into airborne plumes. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/315829 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Cynthia L. Dinwiddie,Timothy N. Titus. Airborne Dust Plumes Lofted by Dislodged Ice Blocks at Russell Crater, Mars[J]. Geophysical Research Letters,2021. |
APA | Cynthia L. Dinwiddie,&Timothy N. Titus.(2021).Airborne Dust Plumes Lofted by Dislodged Ice Blocks at Russell Crater, Mars.Geophysical Research Letters. |
MLA | Cynthia L. Dinwiddie,et al."Airborne Dust Plumes Lofted by Dislodged Ice Blocks at Russell Crater, Mars".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论